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Method for recovering vanadium in hydrochloric acid system

A recovery method and system technology, applied in the field of hydrometallurgy, can solve the problems of serious organic phase entrainment, no industrial use value, and inability to realize industrialized production, etc., and achieve the effect of effective recovery

Pending Publication Date: 2019-08-27
杨秋良 +1
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  • Abstract
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  • Application Information

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Problems solved by technology

This process is difficult to separate the three phases, the separated three phases are back-extracted with soda ash, the viscosity is high, and the entrainment of the organic phase is serious, so industrial production cannot be realized
Wang Keqin, School of Materials Science and Engineering, Taiyuan University of Technology, etc. proposed in the "Experimental Research on the Recovery of Vanadium by Hydrochloric Acid Leaching of Oxidized Red Mud" that vanadium was extracted with acetic acid in hydrochloric acid system. No industrial use value

Method used

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  • Method for recovering vanadium in hydrochloric acid system

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Embodiment

[0017] Such as figure 1 , a titanium dioxide factory that adopts the chlorination method to produce 1000m of hydrochloric acid waste acid per day 3 , the spent acid contains V 2 o 5 2.81g / L, ferrous iron 62.7g / L, HCl 38.8g / L, Mg 20.5g / L, Mn 29.29g / L, Al 89.9g / L, Na 120g / L complex composition, high metal ion content, hydrochloric acid acidity High, in order to effectively recover the vanadium in its waste acid. Using L650 centrifugal extractor as extraction equipment, adopting seven-stage extraction, one-stage oil-water separation, five-stage stripping, and three-stage transformation extraction and stripping transformation process, two production lines have been built.

[0018] Use 100% TBP to dissolve PMBP accounting for 3% of its mass volume as the organic phase of extraction, and take a ratio of O / A 1:1 to L650 centrifugal extraction phase for seven-stage extraction, and the raffinate contains V 2 o 5 0.15g / L, vanadium extraction rate 94.66%, HCl content increase weigh...

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Abstract

The invention belongs to hydrometallurgy, and particularly relates to a method for recovering vanadium in a hydrochloric acid system. According to the method, the vanadium in the hydrochloric acid system is dissolved and completely extracted by adopting a solvent for PMBP, reverse extraction is carried out by using dilute sulfuric acid and hydrogen peroxide for a loaded organic phase as a stripping agent to recover the vanadium in the hydrochloric acid system, raffinate for a stripped organic phase is transformed and returns to an extraction section for recycling, and the vanadium is recoveredfrom vanadium-containing strip liquor according to a conventional process. The method has the beneficial effect that the vanadium can be effectively recovered by means of the organic phase ratio under the conditions of high acid in a hydrochloric acid system, high impurity element content and no pretreatment.

Description

technical field [0001] The invention belongs to hydrometallurgy, and in particular relates to a method for recovering vanadium in a hydrochloric acid system. Background technique [0002] Vanadium recovery in hydrochloric acid system has no industrial application examples at present. The "Tertiary amine N235 three-phase extraction vanadium test under high concentration hydrochloric acid system" proposed by Zhan Chun, School of Resources and Environmental Engineering, Wuhan University of Technology The vanadium is extracted so that the vanadium enters the three phases. This process is difficult to separate the three phases. The separated three phases are back-extracted with soda ash, have high viscosity, and serious organic phase entrainment, so industrial production cannot be realized. Wang Keqin, School of Materials Science and Engineering, Taiyuan University of Technology, etc. proposed in the "Experimental Research on the Recovery of Vanadium by Hydrochloric Acid Leachin...

Claims

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Application Information

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IPC IPC(8): C22B3/36C22B34/22
CPCC22B34/22C22B3/362Y02P10/20
Inventor 杨秋良王利军
Owner 杨秋良